flow: add SingleStreamReceiver

flow/SingleStreamReceiver.c

@@ -0,0 +1,75 @@
+/**
+ * @file SingleStreamReceiver.c
+ * @author Ambroz Bizjak <ambrop7@gmail.com>
+ * 
+ * @section LICENSE
+ * 
+ * This file is part of BadVPN.
+ * 
+ * BadVPN is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ * 
+ * BadVPN is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <misc/debug.h>
+
+#include "SingleStreamReceiver.h"
+
+static void input_handler_done (SingleStreamReceiver *o, int data_len)
+{
+    DebugObject_Access(&o->d_obj);
+    ASSERT(data_len > 0)
+    ASSERT(data_len <= o->packet_len - o->pos)
+    
+    // update position
+    o->pos += data_len;
+    
+    // if everything was received, notify user
+    if (o->pos == o->packet_len) {
+        DEBUGERROR(&o->d_err, o->handler(o->user));
+        return;
+    }
+    
+    // receive more
+    StreamRecvInterface_Receiver_Recv(o->input, o->packet + o->pos, o->packet_len - o->pos);
+}
+
+void SingleStreamReceiver_Init (SingleStreamReceiver *o, uint8_t *packet, int packet_len, StreamRecvInterface *input, BPendingGroup *pg, void *user, SingleStreamReceiver_handler handler)
+{
+    ASSERT(packet_len > 0)
+    ASSERT(handler)
+    
+    // init arguments
+    o->packet = packet;
+    o->packet_len = packet_len;
+    o->input = input;
+    o->user = user;
+    o->handler = handler;
+    
+    // set position zero
+    o->pos = 0;
+    
+    // init output
+    StreamRecvInterface_Receiver_Init(o->input, (StreamRecvInterface_handler_done)input_handler_done, o);
+    
+    // start receiving
+    StreamRecvInterface_Receiver_Recv(o->input, o->packet + o->pos, o->packet_len - o->pos);
+    
+    DebugError_Init(&o->d_err, pg);
+    DebugObject_Init(&o->d_obj);
+}
+
+void SingleStreamReceiver_Free (SingleStreamReceiver *o)
+{
+    DebugObject_Free(&o->d_obj);
+    DebugError_Free(&o->d_err);
+}

flow/SingleStreamReceiver.h

@@ -0,0 +1,46 @@
+/**
+ * @file SingleStreamReceiver.h
+ * @author Ambroz Bizjak <ambrop7@gmail.com>
+ * 
+ * @section LICENSE
+ * 
+ * This file is part of BadVPN.
+ * 
+ * BadVPN is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ * 
+ * BadVPN is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef BADVPN_SINGLESTREAMRECEIVER_H
+#define BADVPN_SINGLESTREAMRECEIVER_H
+
+#include <misc/debugerror.h>
+#include <base/DebugObject.h>
+#include <flow/StreamRecvInterface.h>
+
+typedef void (*SingleStreamReceiver_handler) (void *user);
+
+typedef struct {
+    uint8_t *packet;
+    int packet_len;
+    StreamRecvInterface *input;
+    void *user;
+    SingleStreamReceiver_handler handler;
+    int pos;
+    DebugError d_err;
+    DebugObject d_obj;
+} SingleStreamReceiver;
+
+void SingleStreamReceiver_Init (SingleStreamReceiver *o, uint8_t *packet, int packet_len, StreamRecvInterface *input, BPendingGroup *pg, void *user, SingleStreamReceiver_handler handler);
+void SingleStreamReceiver_Free (SingleStreamReceiver *o);
+
+#endif